The Broken Vase

The vase was already broken when Soren arrived at Station Four.

Not a real vase. A projection of one, hovering on a screen behind a pair of headphones and a complicated chin rest. The sign above the station read PERCEPTION CHALLENGE and below that, in smaller letters, Can you break your own experience?

Most of the other kids at the open house had already moved past this station. It didn't have a brain in a jar. It didn't have a robot arm. It had a chin rest and a screen showing a white vase on a black background, and headphones playing a low hum.

Soren put his chin on the rest and his eyes on the screen.

Nothing happened for a moment. Then the vase turned red. At the same time, the hum in the headphones became a clear tone, a perfect middle C. Red vase, clear tone. They arrived together and they felt like one thing. One event: the vase changing.

Then the vase turned blue. The tone dropped to a low note. Blue vase, low note. Again, it felt like one thing. Not a color and a sound, but a single moment of something happening.

Soren watched the pattern cycle three more times. Red, high. Blue, low. Red, high. Blue, low.

Then on the sixth cycle, something stuttered. The vase turned red but the low note played. The wrong note for the color. And Soren felt it. Not thought it. Felt it. A tiny lurch in his stomach, like missing a step on a staircase.

He pulled off the headphones.

A graduate student was leaning against the wall nearby, eating a granola bar and reading something on her phone. Her name tag said PRIYA and underneath that, in her own handwriting, 4th year, send help.

"Why did that feel wrong?" Soren asked.

"Hmm?" Priya looked up. "Oh. Station Four. Did it do the mismatch thing?"

"The color and the sound didn't go together. But they never went together. I mean, a red vase doesn't have a sound. There's no reason red should go with the high note. But when it switched, it felt broken."

Priya put her phone away. "Yeah. That's the good question."

"What's the answer?"

"If I knew that I wouldn't be a fourth year, I'd be accepting a very large prize somewhere in Sweden." She took a bite of granola bar. "Your brain learned the pairing in about three seconds. Red with high, blue with low. Arbitrary. Meaningless. And then it bound them together into a single experience. When we broke the binding, you felt it in your body. Not your thinking. Your body."

"But how does it bind them?"

"Right. That's the question. The color gets processed in one part of your visual cortex. The sound gets processed in your auditory cortex. Completely different regions, different timing, different neural pathways. And yet you experience them as one moment. One thing happening." Priya pointed at the vase with her granola bar. "Nobody knows how."

Soren looked back at the screen. "Nobody."

"It's called the binding problem. And it's not a small gap in our knowledge. It's a fundamental mystery about how consciousness works. How does your brain take all these separate streams of information and produce this." She gestured at the room, at everything. "This seamless thing you're experiencing right now. Where the color of my shirt and the sound of my voice and the smell of this granola bar are all part of one unified moment of being in a room talking to me."

Soren sat very still.

"Can I try it again?" he asked.

Priya shrugged. "It's your brain."

He put the headphones back on. Chin on the rest. The vase cycled again. Red, high. Blue, low. He tried something. He tried to hear the sound and see the color separately. To experience them as two events instead of one.

He could not do it.

He tried harder. He focused only on the sound, letting the color go soft in his vision. For a half second he thought he had it, the tone existing alone, separate, free of the color. But then the vase changed again and the new pairing snapped together like magnets and it was one experience again.

He took off the headphones.

"I can't unbind them," he said.

"Nobody can," Priya said. "That's what makes it so strange. You can't experience your own experience in pieces. You can't catch your brain in the act of assembling it. By the time you're aware of anything, the binding has already happened. You're always arriving after the work is done."

Soren opened his notebook. Then he closed it. The notebook was for things he could write down, things with edges. This was different. This was about the thing that was doing the writing.

He looked around the room. Twelve stations, forty people, fluorescent lights buzzing above, the smell of hand sanitizer and old coffee. All of it arriving in his mind as one seamless room. One moment. And somewhere inside his skull, in the wet dark, separate regions were processing the light and the sound and the smell and the pressure of the floor against his shoes in total isolation from each other, and somehow, through some mechanism that no one on Earth could yet explain, the result was this. Was him. Was the experience of being Soren, in a room, on a Saturday.

He had always assumed that seeing a thing was simple. That hearing a thing was simple. That the world arrived in one piece because it was one piece.

But it wasn't. The world arrived in fragments, and something he could not observe or control or even slow down was building it into a single seamless whole, sixty or seventy times a second, every moment of his life, and it was doing it right now as he thought about it doing it, and he could not step outside the process to watch because he was the process.

"Priya," he said. "Is this what consciousness is? The binding?"

She looked at him for a long moment. "Some people think so. Some people think it's a piece of it. Some people think we're asking the wrong question entirely." She paused. "Do you want the honest answer?"

"Yes."

"Nobody knows what consciousness is. We don't even agree on how to ask."

Soren turned back to the screen. The vase was white again, waiting for the next visitor, and he stared at it, at the simple stupid ordinary fact of seeing a white vase on a black screen, and understood for the first time that the simplest thing his mind had ever done was a mystery so deep that the entire human species stood at its edge.

He put the headphones back on.